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IV –
1
1. DISASSEMBLY/REASSEMBLY
■
Safety Precautions
To prevent the creation of secondary problems by mishandling, observe the following pre-
cautions during maintenance work.
(1)
Always unplug the power cord before replacing parts or units. When having access to
the power supply, be sure to unplug the power cord from the power outlet.
(2)
When servicing the optical system of the laser printing unit, be careful not to place
screwdrivers or other reflective objects in the path of the laser beam. Be sure to take
off any personal accessories such as watches and rings before working on the printer.
A reflected beam, though invisible, can permanently damage your eyes.
(3)
If the equipment has been printing, allow the fixing unit sufficient time to cool down. It is
HOT!
(4)
Be careful not to lose screws, washers, or other parts removed for parts replacement.
(5)
Do not remove gears from the document LF roller ASSY or ejection roller ASSY if at all
possible. Once removed, they will become unusable and new gears will have to be put
back in.
(6)
When using soldering irons and other heat-generating tools, take care not to damage
the resin parts such as wires, PCBs, and covers.
(7)
Before handling the PCBs, touch a metal portion of the equipment to discharge static
electricity; otherwise, the electronic parts may be damaged due to the electricity
charged in your body.
(8)
When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum
foil.
WARNING
For the MFC6550MC/7550MC/7650MC/9000/9500 which has a nickel-hydrogen battery
on the main PCB, be sure to remove that battery before transporting the PCB (in alu-
minium foil). Failure to do so may result in a short circuit, overcurrent flow, or fire.
(9)
Be sure to reinsert self-tapping screws correctly, if removed.
(10)
Tighten screws to the torque values listed on the next page.
(11)
When connecting or disconnecting cable connectors, hold the connector bodies not the
cables. If the connector has a lock, always slide the connector lock to unlock it.
(12)
Before reassembly, apply the specified lubricant to the specified points. (Refer to Sec-
tion 2 in this chapter.)
(13)
After repairs, check not only the repaired portion but also that the connectors and other
related portions function properly before operation checks.
Содержание MFC 4550
Страница 5: ...CHAPTER I GENERAL DESCRIPTION ...
Страница 14: ...CHAPTER II INSTALLATION ...
Страница 15: ...CONTENTS 1 INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT II 1 ...
Страница 18: ...CHAPTER III THEORY OF OPERATION ...
Страница 49: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 81: ...CHAPTER V MAINTENANCE MODE ...
Страница 89: ...V 7 Scanning Compensation Data List 200 dpi ...
Страница 133: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Страница 163: ...MAIN 8 8 FAX3550 3650 8000P 8200P MFC4550 6550MC 7550MC MFC9000 9500 A ...
Страница 185: ...D CONTROL PANEL 1 2 ...
Страница 187: ...E POWER SUPPLY 120 V Low voltage power supply ...
Страница 188: ...E POWER SUPPLY 200 240 V Low voltage power supply European versions ...
Страница 189: ...E POWER SUPPLY 200 240 V Low voltage power supply Asian versions ...
Страница 190: ...E POWER SUPPLY High voltage power supply ...
Страница 191: ...Sept 98 5X52012 Printed in Japan ...